驱动源码如下cs8900new.c（自己由源代码修改的，只保留）
#define VERSION_STRING "Cirrus Logic CS8900A driver for Linux (Modified for SMDK2410//SMDK2440)"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/irq.h>
#include <linux/fs.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <asm/mach-types.h>
//#include "asm/arch/smdk2410.h" /* ++ */
#include "cs8900.h"
static struct net_device *dev_cs8900;
spinlock_t mylock;
#define MAX_EEPROM_SIZE 256
static inline u16 cs8900_read (struct net_device *dev,u16 reg)
{
outw (reg,dev->base_addr + PP_Address);
return (inw (dev->base_addr + PP_Da
}
static inline void cs8900_write (struct net_device *dev,u16 reg,u16 value)
{
outw (reg,dev->base_addr + PP_Address);
outw (value,dev->base_addr + PP_Da
}
static inline void cs8900_set (struct net_device *dev,u16 reg,u16 value)
{
cs8900_write (dev,reg,cs8900_read (dev,reg) | value);
}
static inline void cs8900_clear (struct net_device *dev,u16 reg,u16 value)
{
cs8900_write (dev,reg,cs8900_read (dev,reg) & ~value);
}
static inline void cs8900_frame_read (struct net_device *dev,struct sk_buff *skb,u16 length)
{
insw (dev->base_addr,skb_put (skb,length),(length + 1) / 2);
}
static inline void cs8900_frame_write (struct net_device *dev,struct sk_buff *skb)
{
outsw (dev->base_addr,skb->da
}
static void cs8900_receive (struct net_device *dev)
{
u16 status,length;
struct sk_buff *skb;
status = cs8900_read (dev,PP_RxStatus);
length = cs8900_read (dev,PP_RxLength);
if (!(status & RxOK))
return;
if ((skb = dev_alloc_skb (length + 2)) == NULL)
return;
skb->dev = dev;
skb_reserve (skb,2);
cs8900_frame_read (dev,skb,length);
skb->protocol = eth_type_trans (skb,dev);
netif_rx (skb);
}
static int cs8900_send_start (struct sk_buff *skb,struct net_device *dev)
{
u16 status;
spin_lock_irq(&mylock);
netif_stop_queue (dev);
cs8900_write (dev,PP_TxCMD,TxStart (After5));
cs8900_write (dev,PP_TxLength,skb->len);
status = cs8900_read (dev,PP_BusST);
if ((status & TxBidErr)) {
spin_unlock_irq(&mylock);
printk (KERN_WARNING "%s: Invalid frame size %d!\n",dev->name,skb->len);
return (1);
}
if (!(status & Rdy4TxNOW)) {
spin_unlock_irq(&mylock);
printk (KERN_WARNING "%s: Transmit buffer not free!\n",dev->name);
return (1);
}
cs8900_frame_write (dev,skb);
spin_unlock_irq(&mylock);
dev_kfree_skb (skb);
return (0);
}
static irqreturn_t cs8900_interrupt (int irq,void *id) /* ++ */
{
volatile u16 status;
struct net_device *dev = (struct net_device *) id;
while ((status = cs8900_read (dev, PP_ISQ))) {
switch (RegNum (status)) {
case RxEvent:
cs8900_receive (dev);
break;
case TxEvent:
netif_wake_queue (dev);
break;
case BufEvent:
if ((RegContent (status) & TxUnderrun)) {
netif_wake_queue (dev);
}
break;
}
}
return IRQ_HANDLED;
}
static int cs8900_start (struct net_device *dev)
{
int result;
set_irq_type(dev->irq, IRQF_TRIGGER_RISING);
cs8900_set (dev,PP_RxCFG,RxOKiE | BufferCRC | CRCerroriE | RuntiE | ExtradataiE);
cs8900_set (dev,PP_RxCTL,RxOKA | IndividualA | BroadcastA);
cs8900_set (dev,PP_TxCFG,TxOKiE | Out_of_windowiE | JabberiE);
cs8900_set (dev,PP_BufCFG,Rdy4TxiE | RxMissiE | TxUnderruniE | TxColOvfiE | MissOvfloiE);
cs8900_set (dev,PP_LineCTL,SerRxON | SerTxON);
cs8900_set (dev,PP_BusCTL,EnableRQ);
udelay(200);
if ((result = request_irq (dev->irq, &cs8900_interrupt, 0, dev->name, dev)) < 0) {
printk (KERN_ERR "%s: could not register interrupt %d\n",dev->name, dev->irq);
return (result);
}
netif_start_queue (dev);
return (0);
}
static int cs8900_stop (struct net_device *dev)
{
/* disable ethernet controller */
cs8900_write (dev,PP_BusCTL,0);
cs8900_write (dev,PP_TestCTL,0);
cs8900_write (dev,PP_SelfCTL,0);
cs8900_write (dev,PP_LineCTL,0);
cs8900_write (dev,PP_BufCFG,0);
cs8900_write (dev,PP_TxCFG,0);
cs8900_write (dev,PP_RxCTL,0);
cs8900_write (dev,PP_RxCFG,0);
/* uninstall interrupt handler */
free_irq (dev->irq,dev);
/* stop the queue */
netif_stop_queue (dev);
return (0);
}
int __init cs8900_probe(struct net_device *dev)
{
int i, value;
printk(VERSION_STRING);
ether_setup (dev);
dev->open = cs8900_start;
dev->stop = cs8900_stop;
dev->hard_start_xmit = cs8900_send_start;
//define mac_addr 协议栈使用的
dev->dev_addr[0] = 0x08;
dev->dev_addr[1] = 0x00;
dev->dev_addr[2] = 0x3e;
dev->dev_addr[3] = 0x26;
dev->dev_addr[4] = 0x0a;
dev->dev_addr[5] = 0x5b;
dev->if_port = IF_PORT_10BASET;
dev->base_addr = 0xe0000000 + 0x300;
dev->irq = IRQ_EINT9;
spin_lock_init(&mylock);
dev_cs8900 = dev;
if (request_region(dev->base_addr,16,dev->name) == NULL) {
printk (KERN_ERR "%s: can't get I/O port address 0x%lx\n",dev->name,dev->base_addr);
return (-EIO);
}
if ((value = cs8900_read (dev,PP_ProductID)) != EISA_REG_CO
printk (KERN_ERR "%s: incorrect signature 0x%.4x\n",dev->name,value);
return (-ENXIO);
}
cs8900_write (dev,PP_IntNum,0);//选择CS8900的0号中断有效
for (i = 0; i < ETH_ALEN; i += 2)
cs8900_write (dev,PP_IA + i,dev->dev_addr[i] | (dev->dev_addr[i + 1] << 8));//这个MAC地址写到了PP_IA寄存器中，作用是地址过滤。
return (0);
}
static int __init cs8900_init (void)
{
struct net_device *dev;
dev = alloc_etherdev(0);
if(!dev)
{
printk("unable to alloc new ethernet\n");
return -1;
}
strcpy(dev->name, "eth%d");
dev->init = cs8900_probe;
return(register_netdev(dev));
}
static void __exit cs8900_cleanup (void)
{
unregister_netdev(dev_cs8900);
release_region(dev_cs8900->base_addr, 16);
free_netdev(dev_cs8900);
}
MODULE_AUTHOR ("zhuwensheng");
MODULE_DESCRIPTION (VERSION_STRING);
MODULE_LICENSE ("GPL");
module_init (cs8900_init);
module_exit (cs8900_cleanup);
cs8900.h内容如下
#ifndef CS8900_H
#define CS8900_H
/*
* linux/drivers/net/cs8900.h
*
* Author: Abraham van der Merwe <abraham at 2d3d.co.za>
*
* A Cirrus Logic CS8900A driver for Linux
* based on the cs89x0 driver written by Russell Nelson,
* Donald Becker, and others.
*
* This source co
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
/*
* Ports
*/
#define PP_Address 0x0a /* PacketPage Pointer Port (Section 4.10.10) */
#define PP_Da
/*
* Registers
*/
#define PP_ProductID 0x0000 /* Section 4.3.1 Product Identification Co
#define PP_MemBase 0x002c /* Section 4.9.2 Memory Base Address Register */
#define PP_IntNum 0x0022 /* Section 3.2.3 Interrupt Number */
#define PP_EEPROMCommand 0x0040 /* Section 4.3.11 EEPROM Command */
#define PP_EEPROMData 0x0042 /* Section 4.3.12 EEPROM Da
#define PP_RxCFG 0x0102 /* Section 4.4.6 Receiver Configuration */
#define PP_RxCTL 0x0104 /* Section 4.4.8 Receiver Control */
#define PP_TxCFG 0x0106 /* Section 4.4.9 Transmit Configuration */
#define PP_BufCFG 0x010a /* Section 4.4.12 Buffer Configuration */
#define PP_LineCTL 0x0112 /* Section 4.4.16 Line Control */
#define PP_SelfCTL 0x0114 /* Section 4.4.18 Self Control */
#define PP_BusCTL 0x0116 /* Section 4.4.20 Bus Control */
#define PP_TestCTL 0x0118 /* Section 4.4.22 Test Control */
#define PP_ISQ 0x0120 /* Section 4.4.5 Interrupt Status Queue */
#define PP_TxEvent 0x0128 /* Section 4.4.10 Transmitter Event */
#define PP_BufEvent 0x012c /* Section 4.4.13 Buffer Event */
#define PP_RxMISS 0x0130 /* Section 4.4.14 Receiver Miss Counter */
#define PP_TxCOL 0x0132 /* Section 4.4.15 Transmit Collision Counter */
#define PP_SelfST 0x0136 /* Section 4.4.19 Self Status */
#define PP_BusST 0x0138 /* Section 4.4.21 Bus Status */
#define PP_TxCMD 0x0144 /* Section 4.4.11 Transmit Command */
#define PP_TxLength 0x0146 /* Section 4.5.2 Transmit Length */
#define PP_IA 0x0158 /* Section 4.6.2 Individual Address (IEEE Address) */
#define PP_RxStatus 0x0400 /* Section 4.7.1 Receive Status */
#define PP_RxLength 0x0402 /* Section 4.7.1 Receive Length (in bytes) */
#define PP_RxFrame 0x0404 /* Section 4.7.2 Receive Frame Location */
#define PP_TxFrame 0x0a00 /* Section 4.7.2 Transmit Frame Location */
/*
* Values
*/
/* PP_IntNum */
#define INTRQ0 0x0000
#define INTRQ1 0x0001
#define INTRQ2 0x0002
#define INTRQ3 0x0003
/* PP_ProductID */
#define EISA_REG_CO
#define REVISION(x) (((x) & 0x1f00) >> 8)
#define VERSION(x) ((x) & ~0x1f00)
#define CS8900A 0x0000
#define REV_B 7
#define REV_C 8
#define REV_D 9
/* PP_RxCFG */
#define Skip_1 0x0040
#define StreamE 0x0080
#define RxOKiE 0x0100
#define RxDMAonly 0x0200
#define AutoRxDMAE 0x0400
#define BufferCRC 0x0800
#define CRCerroriE 0x1000
#define RuntiE 0x2000
#define ExtradataiE 0x4000
/* PP_RxCTL */
#define IAHashA 0x0040
#define PromiscuousA 0x0080
#define RxOKA 0x0100
#define MulticastA 0x0200
#define IndividualA 0x0400
#define BroadcastA 0x0800
#define CRCerrorA 0x1000
#define RuntA 0x2000
#define ExtradataA 0x4000
/* PP_TxCFG */
#define Loss_of_CRSiE 0x0040
#define SQErroriE 0x0080
#define TxOKiE 0x0100
#define Out_of_windowiE 0x0200
#define JabberiE 0x0400
#define AnycolliE 0x0800
#define T16colliE 0x8000
/* PP_BufCFG */
#define SWint_X 0x0040
#define RxDMAiE 0x0080
#define Rdy4TxiE 0x0100
#define TxUnderruniE 0x0200
#define RxMissiE 0x0400
#define Rx128iE 0x0800
#define TxColOvfiE 0x1000
#define MissOvfloiE 0x2000
#define RxDestiE 0x8000
/* PP_LineCTL */
#define SerRxON 0x0040
#define SerTxON 0x0080
#define AUIonly 0x0100
#define AutoAUI_10BT 0x0200
#define ModBackoffE 0x0800
#define PolarityDis 0x1000
#define L2_partDefDis 0x2000
#define LoRxSquelch 0x4000
/* PP_SelfCTL */
#define RESET 0x0040
#define SWSuspend 0x0100
#define HWSleepE 0x0200
#define HWStandbyE 0x0400
#define HC0E 0x1000
#define HC1E 0x2000
#define HCB0 0x4000
#define HCB1 0x8000
/* PP_BusCTL */
#define ResetRxDMA 0x0040
#define DMAextend 0x0100
#define UseSA 0x0200
#define MemoryE 0x0400
#define DMABurst 0x0800
#define IOCHRDYE 0x1000
#define RxDMAsize 0x2000
#define EnableRQ 0x8000
/* PP_TestCTL */
#define DisableLT 0x0080
#define ENDECloop 0x0200
#define AUIloop 0x0400
#define DisableBackoff 0x0800
#define FDX 0x4000
/* PP_ISQ */
#define RegNum(x) ((x) & 0x3f)
#define RegContent(x) ((x) & ~0x3d)
#define RxEvent 0x0004
#define TxEvent 0x0008
#define BufEvent 0x000c
#define RxMISS 0x0010
#define TxCOL 0x0012
/* PP_RxStatus */
#define IAHash 0x0040
#define Dribblebits 0x0080
#define RxOK 0x0100
#define Hashed 0x0200
#define IndividualAdr 0x0400
#define Broadcast 0x0800
#define CRCerror 0x1000
#define Runt 0x2000
#define Extradata 0x4000
#define HashTableIndex(x) ((x) >> 0xa)
/* PP_TxCMD */
#define After5 0
#define After381 1
#define After1021 2
#define AfterAll 3
#define TxStart(x) ((x) << 6)
#define Force 0x0100
#define On
#define InhibitCRC 0x1000
#define TxPadDis 0x2000
/* PP_BusST */
#define TxBidErr 0x0080
#define Rdy4TxNOW 0x0100
/* PP_TxEvent */
#define Loss_of_CRS 0x0040
#define SQEerror 0x0080
#define TxOK 0x0100
#define Out_of_window 0x0200
#define Jabber 0x0400
#define T16coll 0x8000
#define TX_collisions(x) (((x) >> 0xb) & ~0x8000)
/* PP_BufEvent */
#define SWint 0x0040
#define RxDMAFrame 0x0080
#define Rdy4Tx 0x0100
#define TxUnderrun 0x0200
#define RxMiss 0x0400
#define Rx128 0x0800
#define RxDest 0x8000
/* PP_RxMISS */
#define MissCount(x) ((x) >> 6)
/* PP_TxCOL */
#define ColCount(x) ((x) >> 6)
/* PP_SelfST */
#define T3VActive 0x0040
#define INITD 0x0080
#define SIBUSY 0x0100
#define EEPROMpresent 0x0200
#define EEPROMOK 0x0400
#define ELpresent 0x0800
#define EEsize 0x1000
/* PP_EEPROMCommand */
#define EEWriteEnable 0x00F0
#define EEWriteDisable 0x0000
#define EEWriteRegister 0x0100
#define EEReadRegister 0x0200
#define EEEraseRegister 0x0300
#define ELSEL 0x0400
#endif /* #ifndef CS8900_H */
Makefile 内容如下：
ifneq ($(KERNELRELEASE),)
obj-m :=drive.o
else
KERNEL SRC := /usr/src/linux-headers-2.6.28-18-generic
modules:
make -C $(KERNEL SRC) SUBDIRS=$(PWD) $@
clean:
rm -f *.o *.ko *.mod.c .*.cmd *~ *.order *.symvers *.markers
endif
SRC 路径说明：以上的路径是PC机上LINUX源代码路径，这样编译出来的是在PC上运行的（其他驱动一样），要编译成在ARM上运行的模块，SRC改为 /xxx/xxx,代表的是编译成能在ARM上运行的kernel后的内核源代码目录，如我的是/home/akaedu/linux-2.6.27，这 样再执行make编译驱动模块，生成可以插入ARM上内核的模块cs8900.ko
（2）安装文件包lrzsz, sudo apt-get install lrzsz
配置minicom，启动开发板，从nand 启动，首先要保证文件nand上的文件系统是可写的，如yaffs，而cramfs文件系统是只读文件系统。把cs8900.ko复制到家目录下（我的是/home/akaedu）
输入命令:rx cs8900.ko
此时minicom等待文件的输入，按ctrl+a,然后按z，再按s，选择xmodem,此时打开的是家目录，光标移到cs8900.ko，然后按空格键选中文件，再回车键，文件开始传输。传输结束后，在minicon上ls下，看到了文件cs8900.ko。
在minicom上执行命令 insmod cs8900.ko，打印了驱动程序第一行定义的宏，说明插入成功。
启动网卡并为它设置个IP，输入ifconfig eth0 192.168.0.210,此时网卡被激活，可输入ifconfig 查看是否正确。
测试能否ping通主机，
ping 192.168.0.5（主机IP）
（3）挂载主机上的目录到开发板
主机上安装nfs网络服务，sudo aot-get install nfs-kernel-server
重启nfs服务 ,sudo /etc/init.d/nfs-kernel-server restart
编辑主机上的 /etc/exports文件，加入主机上被挂载的目录，如/home/akaedu/root,格式如下：
/home/akaedu/root *(rw,sync,no_root_squash)
*表示允许所有IP访问，括号里内容表示拥有读写，同步，和root权限。
然后在minicom上输入命令 ：mount -t nfs -o nolock 192.168.0.5:/home/akaedu/root /mnt
(主机IP)
这样挂载到了目标板上的mnt目录下，可以进入mnt目录查看是否成功。
（2）将驱动加入内核源代码并静态编译
将 cs8900new.c和cs8900.h（由于cs8900.h就来自这个目录，可以不用拷贝）放入内核源代码目录，如/home/akaedu /linux-2.6.27/drivers/net/arm，编辑这个目录下的Kconfig 和Makefile,参照原有的cs8900配置，在Kconfig 加入
config MY_OPTION
tristate "my option"
config CS8900
tristate "CS8900A support"
depends on NET_PCI && (ISA || MACH_IXDP2351 || ARCH_IXDP2X01 || ARCH_PNX010X || MACH_AKAE2440)
---help---
Support for CS8900A chipset based Ethernet cards. If you have a
network (Ethernet) card of this type, say Y and read the
Ethernet-HOWTO, available from
<http://www.tldp.org/docs.html#howto> as well as
<file:Documentation/networking/cs89x0.txt>.
To compile this driver as a module, choose M here. The module
will be called cs89x0.
config NEW_CS8900
tristate "my CS8900 support"
depends on NET_PCI && (ISA || MACH_IXDP2351 || ARCH_IXDP2X01 || ARCH_PNX010X || MACH_AKAE2440)&&MY_OPTION
沒有留言:
張貼留言